If the rubber fuel line from the tank to the frame mounted steel line has a crack, you will see it, a roaring spray of raw fuel.

Mx is talking about the small rubber hose INSIDE the tank, which you get at this way. Using flare nut wrenches, remove the fuel lines from the plate on the tank, disconnect any electrical connectors and unclamp and remove any small vent lines. Then remove the screws that hold the plate that holds the fuel lines, the pump, and the fuel pickup from the tank/plate, rap the plate sharply to break the gasket seal, and pull it out of the tank. It's several inches long down into the tank, and you'll see the two fuel lines, the fuel pump, and the fuel pickup screen, all hosed and clamped together. The small rubber hoses that splice the pump into the fuel lines must be suction tight on the pickup side, and pressure tight with clamps on the output side. MX is talking about the one on the engine side of the pump. It can have intermittent leaks that kill pressure, mostly temp dependent.